GitHub user kkhatua opened a pull request:
https://github.com/apache/drill/pull/862
DRILL-5420: ParquetAsyncPgReader goes into infinite loop during cleanup
PageQueue is cleaned up using poll() instead of take(), which constantly
gets interrupted and causes CPU churn.
During a columnReader shutdown, a flag is set so as to block any new page
reading tasks from being submitted, before the queues are finally cleared and
memory occupied by the pages released.
More details are in this JIRA comment :
https://issues.apache.org/jira/browse/DRILL-5420?focusedCommentId=16066933&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-16066933
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kkhatua/drill DRILL-5420
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/862.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #862
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commit 2f233d4b1318e29211856877937ef9988c34ffaf
Author: Kunal Khatua <[email protected]>
Date: 2017-06-28T06:35:34Z
DRILL-5420: ParquetAsyncPgReader goes into infinite loop during cleanup
PageQueue is cleaned up using poll() instead of take(), which constantly
gets interrupted and causes CPU churn.
During a columnReader shutdown, a flag is set so as to block any new page
reading tasks from being submitted.
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